Method for determining loads on a mechanical structure and the resultant damage

摘要

A method for determination of loads in a mechanical structure and/or of damage or states in the mechanical structure which result from the loads in the mechanical structure. Rotations of a part of the mechanical structure caused by loads/damage in the mechanical structure are measured by a fiber optic rotation sensor that is rigidly connected mechanically to the structural part. The loads/damage/states in the mechanical structure are deduced from the measured rotations.

主权项

1. A method for the determination of damage or states of a mechanical structure which result from a loading of the mechanical structure, comprising:
determining in each case a sensor signal of a fiber-optic rotation sensor connected mechanically rigidly at least to part of the mechanical structure before and after the loading; determining in each case an earth's rotation signal superposed on the sensor signal from the respective sensor signal; determining on the basis of the superposed earth's rotation signals determined in each case, and without removing the effect of the earth's rotation, a respective instantaneous orientation of the fiber-optic rotation sensor with respect to the earth's rotation axis; determining a change in orientation of the rotation sensor from the respective instantaneous orientations of the fiber-optic rotation sensor before and after loading, and determining the damage or states of the mechanical structure on the basis of the change in orientation of the rotation sensor.